PHOTOS: Zac & Vanessa Venture to See 'Avatar'

Zac Efron and girlfriend Vanessa Hudgens contributed to the $1 billion earnings of Avatar last night in L.A. The couple caught a showing of the new James Cameron epic and signed autographs as they left the theater. Vanessa held on tight at Zac's side, who seemed to be a little camera shy and kept his shades on.